Hexafluoropropylene oxide polymer compositions and a preparing method of hexafluoropropylene oxide polymer using hexafluoropropylene oligomer

Patent metadata

Field	Value
Publication number	US-9725543-B2
Application number	US-201414540551-A
Country	US
Kind code	B2
Filing date	Nov 13, 2014
Priority date	Mar 6, 2009
Publication date	Aug 8, 2017
Grant date	Aug 8, 2017

Abstract

The present invention relates to hexafluoropropylene oxide polymer composition and a process of preparing ofhexafluoropropylene oxide polymer by an anionic polymerization, and in particular the hexafluoropropylene oxide polymer composition comprises an anionic initiator, a polar solvent, hexafluoropropylene and hexafluoropropylene oxide. The hexafluoropropylene oxide polymer is prepared under particular reaction conditions by using the composition, hexafluoropropylene oxide poylymer prepared by using the composition according to a preparation process herein has a weight average molecular weight (Mw) of 1,500-4,000 at −10 to 20° C.

First claim

What is claimed is:

1. A process of preparing hexafluoropropylene oxide polymer, the process comprising:
(a) preparing hexafluoropropylene dimer and hexafluoropropylene trimer by introducing hexafluoropropylene to a mixture of an anionic initiator and a polar solvent at 20-40° C. and under nitrogen altiiosphere, wherein the hexafluoropropylene dimer and hexafluoropropylene trimer are present in a weight ratio of 20-40:80-60based on the total weight of the hexafluoropropylene dimer and hexafluoropropylene trimer; and
(b) preparing hexafluoropropylene oxide polymer of Formula 1 by introducing hexafluoropropylene oxide at an average rate of 1.5-2.5 g/min at −10 to 20° C. to a reactor after the step (a) is conducted, wherein the amount of hexafluoropropylene oxide is 300-700 weight parts relative to 100 weight parts of the hexafluoropropylene dimer and hexafluoropropylene trimer:
CF 3 CF 2 CF 2 O(CF(CF 3 )CF 2 O) n CF(CF 3 )COF:wherein n is an integer of 8-25.   [Formula 1]

2. The process of preparing hexafluoropropylene oxide polymer of claim 1 , wherein the hexafluoropropylene dimer is at least one selected from the group consisting of 1,1,1,2,3,4,5,5,5-nonafluoro-4-(trifluoromethyl)pent-2-ene and 1,1,1,3,4,4,5,5,5-nonafluoro-2-(trifluoromethyl)pent-2-ene, and the hexafluoropropylene trimer is 1,1,1,3,4,5,5,5-octafluoro-2,4-bis(trifluoromethyl)pent-2-ene.

3. The process of preparing hexafluoropropylene oxide polymer of claim 1 , wherein a weight average molecular weight (Mw) of the hexafluotopropylene oxide polymer as measured at −10 to 20° C. is 1,500-4,000.

4. The process of preparing hexafluoropropylene oxide polymer of claim 2 , wherein a weight average molecular weight (Mw) of the hexafluoropropylene oxide polymer as measured at −10 to 20° C. is 1,500-4,000.

Assignees

• Korea Res Inst Chemical Tech

Inventors

• Lee Soo-Bok
• Park In Jun
• Ha Jong-Wook
• Lee Kwang Won
• Lee Sang Goo

Classifications

• C08F214/28 Primary

  Hexyfluoropropene · CPC title

• C08G65/226

  containing fluorine · CPC title

• C08G65/22 Primary

  Cyclic ethers having at least one atom other than carbon and hydrogen outside the ring · CPC title

• C08G65/323

  containing halogens · CPC title

• C08G65/00

  Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule · CPC title